Re: [Xen-devel] [PATCH] x86/VPMU: Check more carefully which bits are allowed to be written to MSRs

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 12/23/2015 12:21 AM, Tian, Kevin wrote:
> > From: Boris Ostrovsky [mailto:boris.ostrovsky@xxxxxxxxxx]
> > Sent: Wednesday, December 23, 2015 12:25 AM
> >
> > Current Intel VPMU emulation needs to perform more checks when writing
> > PMU MSRs on guest's behalf:
> > * MSR_CORE_PERF_GLOBAL_CTRL is not checked at all
> > * MSR_CORE_PERF_FIXED_CTR_CTRL has more reserved bits in PMU version 2
> > * MSR_CORE_PERF_GLOBAL_OVF_CTRL's bit 61 is allowed on versions greater
> > * than 2.
> >
> > We can also use precomputed mask in core2_vpmu_do_interrupt().
> >
> > Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>

I think I missed one more register. Let me send another version.

-boris

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel